Safety-elevator.



H. WATSOIL SAFETY ELEVATOR.

APPLICATION FILED one. 27, 1907..

Pat ented Sept. 22, 1908;.

4 SHEETS-SHEET 1..

b1 mow H. WATSON.

SAFETY ELEVATOR.

APPLICATION FILED 13150.27, 1907..

Patented Sept. 22, 1908.

4 SHEETS-SHEET 2.4

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in can:

H. WATSON,

SAFETY ELEVATOR.

APPLICATION FILED DEO'. 27, L907.

Patented Sept. 22, 1908.

Q SHEETS-SHEET 3.

H. WATSON.

SAFETY ELEVATOR.

APPLIUATION FILED DEC. 27, 1901.

Patented Sept. 22, 1908.

4 SHEETS-SHEET L FTJU.

541 'uenl'oz mun;

WMQM

UNITED STATES PATENT OFFICE.

. Ill'GH WATSON, OF WASHINGTON, DISTRICT OF ()()I..I T\1'B'l.-\.

SAFETY-ELIE VATOR.

improvements in 'devices for 'openin' and closing elevator doors and it has re lation more particularly to devices which remain inoperative-until the car has reached a predetermined ioint;

It is an 0 ject of the invention to provide a novel deviceof this character wherein an electrical contactgnay be made when the car has reachedthe fioorto operate a mechanism which will 0 en the, door,

It is alsoanlo'. ject of the invention to novide novel means in adevice of this ciaracter whereby simultaneously with the closing of the circuit for opening the door a means will be made operative for holding said door open.

It is alsov an object of the invention to provide combination with a device of this character, 'novel means whereby the circuit for controlling the opening of the door will be brokenbefore the door has reached the limit of its movement.

It iialso an object of the invention to provide a novel device of this character wherein the various .doors'i of the elevator-well or shaft are caused to-open by a common motor,

each door having-itsv individual clutch operatin "in conjunction with a shaft operated byt emotor..-'-

- It is also an object of the invention to provide a novel device of; this character wherein the various elements re' uired for the successful operation of the" evice inopening a 'door and holding' said door opened are 4 made operativefrom a single contact.

produce a nove' device "of the character noted; :which will -jgpssess advantages -in e ciency and durability,

points ofsii'n licity,

, proving'a't't e sametime comparatively inex ensiv'e to mannfactureandrinsiiritain.- tlithe foregoing and other objects View, thei'nvent1'on consists the details of I construction "and' in tlie arrangementand combinatio' of-partsit'd be hereinafter-more fully's'et fer n'andelaimecw Specification of Letters Patent. Application filed December 27, 1907. Serial I'IcHtO BJZiKB.

the gears 6 and 7.

Finally an ob'eet' of'this invention isto n describing theinvei'ition iii cent rs:

Patented Sept. 22, 190B.

erence will be had to the accompanying drawings forming part of this specification wherein like characters denote correspondin parts in the several views in which IOUI'O 1, is a verticalsectionof a portion of a well-hole or shaft showing the door on one floor open and the door on another floor closed, the car being shown in section Fig. 2, isa side elevation of the up or portion of a door showing a portion of -the unlocking mechanism in the position when the door is closed; Fig. 3, is a view similar to Fig. 2,, except thattheunlocking mechanism is shown in the position assumed when the door is unlocked; Fig. 4, isa side elevation of the mechanism employed for setting the motor in operation to unlock and 0 en the door; Fig. 5, is a sectional view of t e clutch employed in the operation of the device; Fig. 6, 1s a perspective view of the cut out, em-

ployed for controlling the o eration of the clutch; Fig. 7, is an enlarge sectional view settin forth the various connections require for the successful operation of the invention; Fig. 8, isa view similar to Fig. 7,

illustrating a modifiedform of wiring-wherein the various parts ,are made operative 'from 'asingle contact; Fig. 9, is afragmen suitable brackets is the shaft 4, which is-rotated by a motor 5, through the medium of This motor may be positioned anywhere intermediate the length of,

the shaftbut it has been found best in practice tohave the same located within .:the basement oi the building.

On each floor adjacent the shaft 4-, and at one side ofthe well-hole is a combined clutchand drum 8. This combined clutch and drum may be supported in its proper position in any desired manner as this forms no essential feature of the invention. In its construction,the-combined clutch and drum -com %'ises a driving shaft 9, mountedin 'sui-table earings 10. One end of this shaft pro-.

jects be end one of the bearings and is :provided w th a beveled gear 11, meshing with a beveled gear 12, on the shaft}.. It will thus:

on, is the disk 20, provided on itsface oposed to the magnets with a soft iron ring '21. hen proper electrical connection is made,

. the magnets 14, will become energized and jdraw thereto'the disk 20, and as .long as this connection is maintained the drum 13, will be caused to rotate with the rotation of the shaft 9.

' Secured to the winding drum at one end is the drawing member 22.- This member is illustrated in the drawings as being a cable,

but it is to be understood. that any flexible device which will operate with equal'facility may be substituted therefor- This cable 22, passes over the pulleys 23 and 24 and is se cured to an end of a rod 25, mounted in the brackets 26 and 27. y

Located on the rod 25, are the collars 28, 29, 30 and 31, the collar 28, bein loose on the rod, and collars 29, 30 and- 31, lacing rovided. with set screwsby means of w iph they maybe ad'usted to any desired position. Situated etween the collars -29 and 30, is a spring 32, and between the collars 28 and 29, 1s a spring 33. The purpose of the springs is to cushion the stroke of the rod 25, I as it slides in the brackets. 26 and 27. At-

tached to the forward ciid of the rod 25, is an end of a flexible member 34, the opposit end of said rriember being secured to the upper arm of -a spring-restrained angle-lever 35,

pivoted to one corner of the door. Secured to the other arm of the angle lever is one end of a flexible connection 36, the opposite end of said connection being attached to a spring-- pressed latch 37, which is intended to eng'agl a keeper 38, secured to the wall of the we hole. It will thus be seen that when the winding drum 13, is rotated, the door will be unlatched and caused to open. When. the windin drum 13, has been released from the disk, te weight'39, will cause the door to close. This weight 39, is attached to a flexible member 40, secured to the forward edge of the door. This flexible member 40, passes over a pulley 41.

In order to prevent sudden shocker jar the door in closing, a buffer or cushion 42, 1s rovided to relieve the strain of the weight rom the door when ithas reached the limitof its necessary drop. 1 I 1 Carried by the car is a lever 43, said lever being pivotally connected. to the bracket I 44, secured to an outer surface of the car. Mounted an the free end of this lever 43, is a roller-45, for a purposeto be hereinafter referred to. Intermediate its length, the lever 43 has pivoted thereto an end of a link 46, which has its 0 posite end pivoted to the outer ortion o a foot lever 47, which extends t rough an openin 48,in the car. This foot lever 47, is pivota ly secured intermediate its length to a bracket 49, secured to the base or floor of the car. By this arrangement, the lever 43, may be moved on its pivot.

The roller 45, is intended to engage a contact 50, in order to close the required circuits for opening the door. There is a contact 50, for each door and said contact is secured to ,a wall of-'the'well-hole and is so position'ed that the roller 45, may contact therewith only when'the car 2, is in 'roper alinement with the 'floor for the disc arge or admission of passengers. This contact 50, may be of any desired construction, but it has been found best to form the same of two pieces 51 and 52. The iece 51, is secured to the wall of the well-ho e while the piece '52, is movable eccentrically with relation to the piece 51, through the medium of the links 53, pivoted to the iece 51', and the piece 52, more particulary shown in Fig. 4. These pieces are formed of non-conductive material and have their op osed' or contacting edges faced with condi ctor stripsv 54, to which wires 55 and 56 are connected, the

wire 55,v being connected to the movable 'member while the wire 56 is connected with the stationary member. The wire 56, is in connection with one of the brushes 19, of the clutch. The wire 55, leads to the motor 5. The wire 57, of. the main line is also in connection with themotor. The wire'58, of the main line is in connection with the second brush 19, of the clutch. By this arrangement, it will be seen that when the car has been stopped atthe pi'ope'r. floor, and the op-. erator presses the foot lever 49, the roller 45,

will force the contact iece 52, against the piece 51, and thereby clbse a circuit through the wires 58, 56, 55 and 57, which contact will cause the motor 5, to rotate theshaft 4, and ener ize the magnets 14, which will ef fect the esired rotation ofthe winding drum 13, and thereby cause the door to open as will, it is thought, be fully understood.

The line 55, is interrupted by a switch 59. This switch may be of-any structure which will meet the necessities of practice and it has been found desirable teem-ploy the form shown in Fig; 6, wherein the pivoted blade 60, normally engages the contacts 61, said engagement being maintained through the medium of the contraction spring 62. Tl11S stops the rotation of the winding drum 13, when the door has been caused to open'sufiiswitch forms, an e ntial feature of the in-; ventign as, this sw'itc breaks the circuit and for its operation. a H

Extendingrearwardly from the door is an arm 63, which is in a line with the blade 60, and is intended to contact therewithfsaid blade being preferably extended beyond an edge of the base block-64,'- of the switch. The arm 63, contacts with the blade 60,. 'ust before the door has reached the limit 0 its movement and forces the blade out of engagement with the..contact 61, and thereby reaks the circuit, which will consequently stop the motor and free the winding drum from the disk 20.

Under ordinary circumstances, the weight 39, would cause the door to close immediatel upon the breaking of the circuit, but to hold the doors open until the car leaves its position, the magnets 65, are carried by the well-hole and are intended to, contact with the rear edge of the door or a metallic strip 66, carried th reby. When the car is in osition, these liiagnets are inactive, but w en the car has stopped at the floor, the roller 67, carried by the arm 68, projecting rearwardlyfrom the can closes the contact 69, said contact being of the same construction as the one hereinbefore'referred to.

The movable member of the contact is connected with the main wire 58, by the wire 70, while the immovable member is connected with the ma nets by the wire 71 said wire being continued and connected with the wire 57, of the main line. Thus it will be seen that when the contact 69, is closed, the

magnets are energized. When the car is moved the contact 69, separates as soon as the roller 67,fpasses therefrom.

i From the re'going description, it will be seen that unless the device is in o eration, there is -no waste of electricity. en the time comes for the closing down of the elevator, the main line circuit may be broken by the switch 72, when the door will close. Ac cess may be had to the car by the operator in the usual we by a keyor the. like, it being understood t at the mechanism hereinbefore referred to will not interfere with the gate being operated manually.

It has been found'in thesucc'essful operation of the invention that it is well'to control the operation ofthe magnets 65, b the contact used in conjunction with the-f oot lever. This arrangement is more articular-1y shown in Fig. 8. In this form t e wire'73, of the main line is connected with the stationary member of the contact while the movable member of the contact is connected b wire 7 4, with one of the brushes of the c utch, said wire 74, being interrupted by a switch 75 asin the form hereinbeforereferred to. The second brush of the clutclf is connected by a wire 76, withthe motor 77, said motor being connected, with the wire 78, of the main line by'the wire 79. The magnets 80,

the

81, and with the wire 78', of the mainline, by-

the wire 82. "It will'therefore be seen that when the pieces of the contact are in engagement, circuits will be formed for the motor,

clutch, and the magnets, and that when the switch 75 is broken, a circuit will still be maintained for the magnets and that the said In nets will be energized as long as the pieces .0 the contact are held in engagement one with the other.

While not essential, it has been found advantageous to have the contacting end of the arm 63, cushioned. This cushioning may be effected in any manner but it has been found desirable to have a telescoping member '84, which is held at the limit of 1ts outward movement by the coiled spring 83.

"The device as hereinbefore set forth has been described in conjunction with a wellhole wherein each floor has but one door. It is to be understood, however, that a multiplicity of doors may be operated by the present device with equal facility, the slight changes which may of necessit accrue, easily fall within the scope of a s 'lled mechanic.

I claim:

1. In combination with an elevator shaft and its doors, a car, a winding drum for each door, a flexible connection between each drum and its door whereb the drum will move the door in one direction, andameans common to all the doors for rotating the drums. M i' 2.- In combination with an elevator shaft and its doors, a car, a winding drumfor each door, a flexible connection between each drum and its doorwhereby the drum will move the door in one direction, a meanscommon to all the doors for rotating the drums, and' means wherebythe o crating means is made inoperative-when, the door has been moved a predetermined distance.

3. In combination with thedoors of an elevator shaft, .a car, a winding drum for each door, a flexible connection between each drum and the doortobe operated by the.

drum, means for transmitting power,to the drums, and electrically controlled means'for intermittently connecting the drums to the power transmitting means.

4. In combination with the doors of an elevator shaft, a car movable with relation to the doors, means for operating the doors, a motor independent of t e car moving motor for actuating the door 0 crating means,

and electrically controlled evices for connecting the door operating means with the actuating means.

5. In combinationwith the doors of an elevator. shaft, a car movable in the shaft, means for holding the doors normally closed,

door opening means comprising an electric-. ally controlled clutch stationed in operative relation to each door, a source of power for i In testimony whereof, I aflix my signature rotating onci memliier of each clufich, and in the presence of two witnesses. means for e ectrica, y connecting t e parts Y of only; one clutch indepen dently of the other A v HUGH WATSON 5 clutc es, whereby one door openin means Witnesses:

may be operated independently of t e other WM. J. KNoBLocH,

door opening means. W ILFRED E. LAWSON. 

